Well i'm putting together either a 4.060 with a 6" rod and 4" stroke. or 4.060 bore with 6.2" rod and 3.85" stroke. The probe srs pistons I have will work with either combo. This will be my daily driver that will see ocassional racing on the weekend. What would the cubic inches be of the two combo's? Also what heads would you guys recomend? Thanks